US Patent No: 4,230,583

Number of patents in Portfolio can not be more than 2000

Supported anisotropic reverse osmosis membranes based on synthetic polyamides and processes for their preparation

Stats

ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

Supported anisotropic reverse osmosis membrane based on synthetic polyamides are prepared by first preparing a support therefor for treating a material suited for serving as a support for a polyamide membrane, with a heat resistant water soluble polymer which is insoluble in the polar solvents to be used for preparing the polyamide solution described below; preparing a solution of the polyamide in an organic polar solvent, in the presence of a saline compound; spreading the thus prepared polyamide solution onto the prepared support; partially evaporating the solvent by heating; coagulating the membrane in an aqueous medium; and optionally, thermally treating the membrane.

Loading the Abstract Image... loading....

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

  • Assignment data not available. Check USPTO

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chiolle, Antonio Ferrara, IT 13 107
Gianotti, Giuseppe Novara, IT 7 88
Parrini, Gianfranco 46/9, Via della Moscova, Milan, IT 1 41

Cited Art

  • No Cited Art to Display

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
SIEMENS INDUSTRY, INC. (29)
7,938,966 Backwash method 9 2003
8,372,282 Mixing chamber 0 2003
7,404,896 Modified membranes 16 2004
7,300,022 Modified membranes 27 2004
7,247,238 Poly(ethylene chlorotrifluoroethylene) membranes 24 2004
8,268,176 Backwash 0 2004
7,387,723 Filtration apparatus comprising a membrane bioreactor and a treatment vessel for digesting organic materials 18 2005
7,819,956 Gas transfer membrane 10 2005
7,931,463 Apparatus for potting membranes 8 2005
7,862,719 Square membrane manifold system 8 2005
8,377,305 Continuously variable aeration 0 2005
7,867,417 Membrane post treatment 3 2005
8,048,306 Scouring method 1 2005
7,455,765 Wastewater treatment system and method 12 2006
7,591,950 Submerged cross-flow filtration 11 2006
7,988,891 Monopersulfate treatment of membranes 0 2006
7,563,363 System for treating wastewater 10 2006
7,632,439 Poly(ethylene chlorotrifluoroethylene) membranes 12 2007
8,293,098 Infiltration/inflow control for membrane bioreactor 0 2007
8,182,687 Methods of minimising the effect of integrity loss in hollow fibre membrane modules 0 2008
8,318,028 Infiltration/inflow control for membrane bioreactor 0 2008
7,722,769 Method for treating wastewater 11 2008
7,718,065 Filtration method and apparatus 10 2008
7,718,057 Wastewater treatment system 10 2008
8,382,981 Frame system for membrane filtration modules 0 2009
8,057,574 Membrane post treatment 0 2009
8,287,743 Membrane cleaning with pulsed airlift pump 0 2010
8,262,778 Membrane post treatment 0 2011
8,372,276 Membrane cleaning with pulsed airlift pump 0 2011
 
EXXON RESEARCH AND ENGINEERING COMPANY (3)
4,861,628 Thin film composite membrane prepared by suspension deposition 17 1987
4,828,773 Highly aromatic anisotropic polyurea/urethane membranes and their use for the separation of aromatics from non-aromatics 5 1987
4,879,044 Highly aromatic anisotropic polyurea/urethane membranes and their use for the separation of aromatics from non aromatics 16 1989
 
HOECHST AKTIENGESELLSCHAFT (2)
4,720,343 Macroporous asymmetrical hydrophilic membrane made of a synthetic polymer 31 1982
5,009,824 Process for preparing an asymmetrical macroporous membrane polymer 23 1989
 
MEDIVATORS INC. (2)
5,762,798 Hollow fiber membranes and method of manufacture 61 1993
RE36914 Dialysate filter including an asymmetric microporous, hollow fiber membrane incorporating a polyimide 5 1999
 
PALL CORPORATION (2)
6,596,112 Laminates of asymmetric membranes 13 2000
7,851,043 Laminates of asymmetric membranes 0 2003
 
KURARAY CO., LTD. (1)
4,938,778 Composite hollow fiber type separation membranes processes for the preparation thereof and their use 33 1986
 
SEPAREM S.P.A. (1)
5,028,329 Process for preparing reverse-osmosis membrane, and membrane obtained with the process 12 1989
 
SIEMENS WATER TECHNOLOGIES HOLDING CORP. (1)
7,226,541 Membrane polymer compositions 26 2003